Nail



C. C. JENSEN.

NAIL- APPLICATION HLED MAY 10. 1920.

Patented-Apr. 25, 1922.

" INVENTOR.

HTTORNE CARL c. JENSEN, or cnroaeo,

mnmorsaassrenon. roio'namr. comranz or oincaeo, rumors; A conroimrronjor rumors.

' Speeification of Letters Patent. 7

Application filed May-10, 1920.; Serial No. 350,345.

' o all whom a c'oncem':

Be it known that I,- CARL C. JENSEN, ,a

citizen of the United States; residin at Y tate of Illinois, have invented certain new andwh h. the

" "proved nail complete, 1

Chicago, in the county of Cook and useful Improvements in Nails, of following is a specification.

This invention relates to unproven;ents 1n nails especially adapted for clamping the meeting ends'of sections of wood together.

Generally, in the'manufacture of nail's of the above type theclamping shoulders along the edges of the same arev swagedor' otherwise secured along the edges of a' tapered blank of metal and, as both the tapered blank and-the clamping shoulders must be separately formed, the cost of manu-- 'faoture is comparatively high.

An important ob ect of; this" invention is therefore to provide novelmeans whereby the shank ofa nail of the above type and the clamping shoulders along the edges of the same maybe formed from a single piece so as to dispense with the necessity of swaging or otherwise securing the clamping shoulders alonglthe longitudinal edges of the blank. I

A further object of the invention is. to

provide a nail 'of the class'describedwhere- 1n the web or shank of the sameis stamped or rolled to form depressions which gradu- I ally increase width toward. the forward the width of the nail in the direction of itsend of the web for gradually increasing driving end.- I I A further objectofthev invention is to provide a nail of the class described having novel means for indicating to thegoper a'tor' ftfe nail upon being driven into the meeting ends ofthe proper direction of travel.

the wood sections. 7 I

The invention further'aims to provide-a hail of the class described which'is cheap to p manufacture, efiicient and desirable in use,

Other objects and advantages .of the in vention will be apparentduring the course of the following description: In the accompanying drawing forming a part of this application andfin which'like numerals are employed to designate like parts throughout the same, Figure 1 is a plan view of a blank of metal from which the improved .nail may.

blankscut to the proper length,

be formed,

Figure 2 is a plan view of one of theln ail rolling operation,

gradually .to the forward end of the web so-that-the Figure 1 plan View of the impro ed nail; prior to the stamping operation,-

F gure ,4 isa plan vlew ofthe improved nail at the completion oi the stampingor Fgure- 5 is a perspective view of'the im ama Apr. 25, 1e222 Figure 6 is a transverse section'taken on line 6'6 of Figure '5,

'Figure 7 is a transverse section taken on line 7-7 of Figure 5, 7

Figure 8 is a perspective view of the improved nail, the view illustrating the manner in. which the same is used.

In the drawings wherein for the. purpose of illustration is shown a preferred embodiment'of the invention, the numeral 10 generally designates a blank of metal from .which. the improvednail is formed. I I1.

practice the length'of metal 10 may be cut into a plurality of sections to form a nail blank 11 which as illustrated in Figure'2 .is of elongated formation and comprises a flat web. or shank 12 and longitudinally extending parallel flanges or shoulders 13 formed integral with the longitudinal edges of the web 12. As illustrated in Figures 2 and 3, the nail blank 11 has its longitudinal edges extending in parallel relation and in "order to give the web the desired taper toward the rear end the .web is formedwith;

a depression or mutilation 15 on each side'.-

The depressions or mutilation on each side oflthe Web may be formed by stamping or rolling and -the metaldisplaced by this stamping or rolling operation flares the forward portion of referenceto Figure 5, it will be-noted that thestamped or mutilated portion of the web increases in widthfrom the rear the blank laterally. With nail is uniformly and gradually decreased 1 in width' towards its rear end. The mutilations -or depressions' ;15 formed on opposite sides of the shank or web form shoulders 16 which coact with the shoulders or flanges together, -asthe.nail is driven home; That is to say, the shoulders 16ex'tend outwardly .13 to eflectiv'ely draw the. sections of. wood i posed angularly with relation to the longitudinal center. of the wood and with relation to the side shoulders 13. The depres=- o.

sions .15 in opposite sides of the shank extend out through the forward end of the same-and therebydecrease the, thickness of maintained directly between the meeting por the? ifoi'ward endj of the shank sothat the same may readily enter the" sections? of i wood.

. shankare beveled along-theirfree edges so that upon driving the nail into the meeting ed es ofa pair of. wood sections the wood will be efie'ctively clamped together and will not crack. V V

The'weh is formed withicentrall longitudinally extending ribs .18 on opposite sides and which extend out through opposite ends of the nail andserve as a guiding means when the-nail isbeingldriven into place. It might be stated that it is highly important to drive the nail exactlystraight into lthe meeting portions of the wood sections to provide an eflicie-nt connection-between the parts. The rib 18 on each sideof the nail is therefore tions of the sections of wood so as to assure the proper positioning-of the nail. As the width of the rear end of the nail is only a fractional part of an inch less -'than, the forward end of the nail, the rear end is frequentlydriven first with the result that the sections are spread ratherthan clamped toether. To overcome this difiiculty and to ispense with the necessity of examining each nail prior to driving the same into place, I have formed an arrow head 20 at the ward flared, end is, of course, driven into the work first and as the/shoulders l3 and a forward end of each centrally arranged rib 18 to indicate to the operator the proper direction of travel of the nail. By this construction the operator may see at a glance which is the forward end of the nail and may therefore work with increased rapidity.

The arrow heads 20 may also serve as grip-- ping means to prevent the displacement of or working out of the nail.

' In the use of the improved nail the for- 16 enter the sections of wood, the sections are drawn tightly together." The fibres of wood a'djacent'the inner shoulders 16 are engaged by said shoulders so that the same cooperate with the outer shoulders -l3 in drawing the sections together. 'As the nail is being driven home-then ribs 18 are kept in line with the meeting ends of the sections of wood so that equal portions of the. shank are driven into each of the sections of wood As was {as in, Figures s, "and, 7," the shoulders, 13 formed along the edges of the relays? "for producing an-eficient andsecure connection between the parts.

'- Having thus described the invention,

what is claimed as new is;

1. A clamp nail includinga shank having strai ht parallel ends and having gripping shouilers on its faces between its side edges and depressions between said shoulders, said depressions being 'eachcontracted toward v one end of the shank whereby the shoulders areconverged, and the faces of the shank between tho-shoulders and the respective side edges of theshank being the outer edges of the shoulders,

" 2'. A clamp nail. including a shank and lhteral flanges along the longitudinal edges of the shank, said shank beingformed with depressions in its opposite faces formingshoulders spaced inwardly from said flanges,

and the faces of the shank between the shouldersand the respective flanges being flush with the outer edges of the shoulders.

3. A clampnafl comprisinga shank and 'flanges along the side edges of the shank,

the shank having depressions in its opposite faces between its m'de edges and extending from end to end of the shank, said depressions gradually and uniformly increasing ribs whereby shoulders are formed between the ribs and the flanges, the ribs being pointed at the driven end of the shank and the height of the shoulders being less than the height of the flanges, the opposite faces of the shank lying in parallel planes touching the outer edges of the respective shoulders and pa'ming through the bases of the respective flanges. k

in testimony whereof I afiix my signature.

CARL o. JENSEN. L1 8-,

clamp nail comprising a shank and 

